Plate Tectonic

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Across
  1. 3. liquid core that surrounds Earth's solid inner core
  2. 4. vibrations caused by breaking rocks along faults
  3. 6. waves that travel outward from an earthquake's focus and move through Earth by causing particles in rocks to vibrate at right angles to the direction of the wave
  4. 9. theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle
  5. 13. break in rock due to compression forces, where rocks above the fault surface move upward and over the rocks below the fault surface
  6. 15. measure of the energy released by an earthquake
  7. 16. surface along which rocks break and move
  8. 17. opening in Earth's surface that often forms a mountain when layers of lava and volcanic ash erupt and build up
  9. 19. energy waves that are produced at and travel outward from the earthquake's focus
  10. 21. location in the mantle that is hotter than any other areas and that melts rock, which is forced up toward the crust as magma
Down
  1. 1. very dense, solid center of the Earth
  2. 2. hypothesis proposed by Alfred Wegener that the states that continents have moved slowly to their current locations on Earth
  3. 5. break in rock due to tension forces, where rock above the fault surface moves downward in relation to rock below the fault surface
  4. 7. Earth's outermost layer, which varies in thickness and is separated from the mantle
  5. 8. waves that travel outward from an Earthquake's focus and cause particles in rocks to move back and forth in the same direction the wave is moving
  6. 10. an earthquake wave that travels around the earth's surface and is usually the third conspicuous wave to reach a seismograph
  7. 11. point of Earth's surface directly above an earthquake's focus
  8. 12. scientist who studies earthquakes and seismic waves
  9. 14. largest layer inside Earth, lying directly above the outer core and that is made mostly of silicon, oxygen, magnesium, and iron
  10. 18. device used by seismologists to record primary, secondary, surface waves from earthquakes
  11. 20. in an earthquake, the point beneath Earth's surface where energy release occurs